Weldner韦尔德纳weldv.焊接；使结合n.焊接；焊缝welding process performance test焊接工艺性能试验welding technology specification焊接技术规范welding between different steels异种钢焊接welding rod with alkaline coating碱性焊条welding wire-mesh reinforcement钢筋焊接网welding electrode production line电焊条生产线welding technics redeeming system焊接工艺补偿量计算系统welded-steel plate construction钢板焊接结构welded H-shaped cross-sectionswelded-wire fabric reinforcement焊接钢丝网配筋